Recording method for magneto-optic memory medium

Details Recording method for magneto-optic memory medium Recording method for magneto-optic memory medium

1991-01-07

1993-06-29

Popek, Joseph A.

Static information storage and retrieval

Information masking

Polarization

360 59, 369 13, 428694, G11C 1306, G11B 5716

Patent

active

052240681

ABSTRACT:
A recording method for a magneto-optic memory medium of exchange-coupled type having a recording layer of a low Curie point and high coercive force and a reading layer of a high Curie point and low coercive force, which comprises the steps of: applying a magnetic field to the magneto-optic memory medium to develop a predetermined data in the reading layer, and then applying both an optical beam and a magnetic field to the magneto-optic memory medium for writing the predetermined data in the recording layer, and simultaneously verifying the data upon the writing on the basis of a Kerr effect of the optical beam caused by the reading layer.

REFERENCES:
patent: 4695514 (1987-09-01), Takahashi et al.
patent: 4701881 (1987-10-01), Tanaka et al.
patent: 4794560 (1988-12-01), Bell et al.
patent: 4871614 (1989-10-01), Kobayashi
patent: 4922454 (1990-05-01), Taki
"Dual-Film Disk Hikes Magneto-Optic Density" Electronics Jun. 1986, pp. 24-25.

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